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Technologies and Initiatives Related to Low Carbon
From material production to construction, operation, renovation, and demolition—this chapter introduces the Obayashi Group’s technologies, initiatives, and real-world examples aimed at minimizing CO2 emissions at every stage of the construction process.
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Chapter 01-1Materials Development
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Chapter 01-2Construction
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Chapter 01-3Operation and Renovation
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Chapter 01-4Demolition
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Chapter 01-1 Materials Development
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Clean-Crete
Environmentally friendly concrete utilizing industrial by-products
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Clean-Crete N
Achieving net-zero—and even negative—CO2 emissions during production
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Lignin-Crete
Decarbonization-supporting concrete made with woody biomass
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Recabo-Crete Method
Reusing CFRP offcuts as short fibers to reinforce concrete and reduce rebar usage
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By-pro Geo / Clean-Crete Geo
Reducing CO2 emissions from ground improvement work by 50%
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Infill Hard Geo
Grouting material for ground improvement—reduces CO2 emissions during production by 60%
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Scallop Seal / Scallop Paint
Sealant and paint made with powdered scallop shells
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3D Printing Technology Using Recycled Plastic Waste
Used in flake form as raw material for 3D printing
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Chapter 01-2 Construction
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Remote Crane Operation
Utilizing Digital Twins to achieve safe and efficient crane operations
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Remote Construction for Dam Embankment and Chimney Demolition
Safe and efficient heavy machinery operations
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Use of Battery-Powered Large Electric Construction Equipment
First on-site deployment of a 20-ton class battery-powered hydraulic excavator in Japan
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Utilization of Biodiesel Fuel
Use of biodiesel fuel at construction sites to reduce CO2 emissions from diesel oil
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OGENTS
Automating various shield tunneling operations
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Energy-Saving Shield
Achieving high-speed excavation and energy savings with a double cutter method
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Carbon-Neutral Backfill Grouting Material
Reducing CO2 emissions during shield tunnel construction to net-zero or below
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Clean-Crete Segments
Environmentally friendly segments with significantly reduced CO2 emissions
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URUP Method
Significantly reducing CO2 emissions through ground-level launch and arrival
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Fireproof Coating Spray Robot
Achieve the same productivity and spraying quality as skilled-workers
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Construction Simulator GEN-VIR*
*GEN-VIR is a registered trademark of Toyota Motor Corporation.Visualizing work in advance with 3DCG to optimize processes and worker movements
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MR-Based Quality Control System “holonica”
Overlaying BIM and reality to streamline inspections and construction checks
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AI-Powered Drawing Verification System
Automatically checking structurally critical areas of LRV construction
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Soil-Adhesion Prevention Component “GeoDrop”
Reduces heavy equipment work time by over 10%, contributing to CO2 emission reduction
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3D Printing in Architecture
Turning free-form design ideas directly into reality
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3D Printing in Civil Engineering
Enhancing safety and construction quality while shortening the project timeline
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Metal 3D Printing
Expanding the possibilities of construction 3D printing with metal materials
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Chapter 01-3 Operation and Renovation
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Carbon Design Tool “E-CO BUILDER”
Supporting evaluation of investment effectiveness toward carbon neutrality
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Simplified ZEB Ready Evaluation System
Quick and highly accurate evaluation using simplified building envelope load estimates
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Smart Building Service
Managed Built Environment Service (M-BES)
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Managed ESG Service
ESG Building Management solutions
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DAYFREE
Replacing highway bridge decks with just one lane closed at night
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HOLLOWAL
Replacing hollow slab bridges in half the time
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PC Wider
Bridge widening using PCa-U girders for concrete bridges
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Compact Invert
Rapid invert construction using precast components
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One-Bind Cross
Faster, higher-quality reinforcement of tunnel linings
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Stiff-Crete
Achieving both early traffic reopening and highly durable deck reinforcement
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Chapter 01-4 Demolition
